eaged salmon and trout in Chile 1

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1 Revta bras. Zoot 1 R (~linl 1 \.?I':Q _?71':?nn~ Ani/oera montti sp. n. (Isopoda, Cymothoidae) a parasite of eaged salmon and trout in Chile 1 Vernon E. Thatcher 2 Carlos Lobos Blumenfeldt 3 ABSTRACT. Ani/oera monlli sp. n. (Isopoda, Cymothoidae) is described trom the mouths and branchial chambers of caged salmon and trout from Puerto Monti, Chile. The description is based on a detailed study of 30 male specimens. No females were found, indicating that salminoids are not the normal hosts of the parasite. The new species differs from others in the genus by having carinae on pereopods 4-7, a pleon that is abruptly narrower than the pereon, second pleopods without appendices masculina, a pleotelson that is wider than long and uropods with subequal rami. KEY WORDS. Isopod, cymothoid, fish parasite, Chile, South America Cymothoid isopods as parasites of marine fishes are found in most parts of the world but are more numerous in warm coastal waters of tropical and subtropical regions. TRlLLES (1991) listed 39 species for the genus Aniloera worldwide. WILLI AMS & WILLIAMS (1981) described nine new species of Aniloera from the Caribbean Sea, one of which occurs as far south as Patagonia and the Strait of Magellan. BRUSCA (1981) reported only two species of the genus from the Eastern Pacific Ocean, one of which might occur along the South American coast. ROKITSKY (1984) described Ani/oera huaeho from coastal waters of Peru. The present paper describes a new species of this genus from cultured sal monoid fishes of Southern Chile. MATERIAL AND METHODS Cymothoids were removed from the mouths or gill chambers of their hosts and preserved in 70% alcohol. Appendages were dissected from the isopods and cleared in pure phenol for study in temporary mounts. Permanent preparations were made by means of the phenol-balsam method described in THATCHER (1991). Photographs of the mouthparts were made with a digital camera and a standard light microscope. Drawings were made with the aid of a camera lucida. Measurements are in micrometers (flm) unless designated as millimeters (mm). 1) Contribution number 1298 of the Departamento de Zoologia, Universidade Federal do Parana. 2) Departamento de Zoologia, Universidade Federal do Parana. Caixa Postal 19020, Curitiba, Parana, Brasil. Research Fellow of the CNPq. 3) Aquatic Animal Health, Puerto Mont!, Chile.

7 Revt~ hr:l~ 7nnl -tr tf:,... 1 "'\...,en Ani/oera montti sp. n. a parasite of eaged salmon and trout Figs Ani/oera montti sp. n., male. (20) Pereopod 6; (21) pereopod 7; (22) pleopod 1; (23) pleopod 2; (24) pleopod 3; (25) pleopod 4. Scales: = 15-19, = 1.0 mm. subsequent redescriptions had been based on a mixture of distinct species. They described nine new species of the genus some of which had been previously called A. faticauda by others. The new species herein described plainly belongs to the genus Anilocra by virtue of the fact that the frons is bent downward between the bases of the antennules. A nilocra montti sp. n. differs from the other known species in having carinae on pereopods 4-7, a pleon that is abruptly narrower than the pereon, a pleotelson that is wider than long, second pleopods without append ices masculina and uropods with subequal rami. REFERENCES BRUSCA, R.C A monograph on the Isopoda Cymothoidae (Crustacea) of the eastern Pacific. Zool. Jour. Linnean Soc. 73 (2) : ROKITSKI, J A new isopod, Ani/oera huaeho sp. n. orthe family Cymothoidae from coastal waters of Peru. Parazitologya, Saint Petersburg, 18 (3): SMITIIE, F.B Naturalist's color guide and supplement. New York, Amer. Mus. Nat. His., 229p. THATCHER, V.E Amazon fish parasites. Amazoniana, Ploen, 11 (3/4):

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